The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 1978
Filed:
Aug. 12, 1977
William E Roberts, Palos Verdes Penn., CA (US);
Addressograph-Multigraph Corporation, Los Angeles, CA (US);
Abstract
A microfiche developer of a type which includes upper and lower walls that are slightly spaced to receive a microfiche, and which also includes a seal extending around a region between the plates where the microfiche lies, to seal this region when pressured ammonia or other developer is introduced through a conduit in the lower wall into this region to develop a microfiche therein. Passages are formed in the upper wall to receive air during the period when ammonia is pumped into the sealed region, to draw the microfiche up against the upper wall so that all of the lower face of the microfiche which carries the emulsion, is exposed to the developer. The seal is an elastomeric ring with radially inner and outer flanges that are held down and sealed to the lower wall, a middle portion which can be deflected up against the upper wall, and intermediate portions which lay up against the supporting wall portions when the middle portion is deflected up.